(a)[2]
Use this information to order the metals by reactivity, placing the least reactive first.
(b)[3]
Describe three ways in which iron's properties are different from potassium's.
(c)[2]
Balance the chemical equation shown for this reaction.\n\n$....\text{Fe} + ....\text{O}_2 \rightarrow \text{Fe}_3\text{O}_4$
(d)[1]
How does this equation demonstrate that iron(III) oxide is reduced?
(e(i))[2]
Describe a test for iron(II) ions.
(e(ii))[1]
Deduce the molecular formula of this compound, showing how many iron and chlorine atoms there are.
(f)[2]
In which bottles will the iron nails not rust? Give reasons for your answer.